Gravity door-lock.



A. E. SPOONER. GRAVITY DOOR LOOK.

. 'AIRPLIGVATION FILED APR.4,1912.

1,047,847, Patented Dec. 17, 1912.

coLumnm PLANUGRM]! COuWASHINGTON. n. c.

' spindle of a thumb-slide.

ALBERT E. srooivnn, or RENFREW, oNTARIofoANADA.

v GRAVITY DOOR-LOCK.

Specification of Letters Patent, 7 i

To all whom it may concern:

Be it known that I, ALBERT EDWARD SrooNER, a subject of the King of'Grea-t Britain, residingat Renfrew, in the county of- Renfrew Province of Ontario, Canada, have invented certain new and useful Improvements in Gravity Door-Locks, of which the following is a specification. 1

My invention relates to improvements in gravity door-locks as described in the "present specification and illustrated by the accompanylng drawings that, form part of the same.

The invention consists essentially in the combination with lock-bolts of a plurality of pivotally arranged weights whereby the latch-bolt is operated by one weight in combination with a suitable thumb-slide, and the lock-bolt is operated by the other weight in combination with the lock key.

The objects of my invention are to provide a new, simple and inexpensive doorlock, without any complicated parts to wear or get out of order and one that will at the same time be thoroughly practical and eflicient.

A further object is to provide a lock of this class with a stationary knob or handle, the latch-bolt being shot inwardly by means of a small thumb-slide arranged beneath thestationary knobs on each side of the door.

With these and other objects in view reference is had to the accompanying drawings in which like letters of reference indicate corresponding parts in each figure, and in which Figure l is a view of the outside of the lock fitted on a door showing the stationary knob with parts broken away for thumb-- slide. Fig. 2 is an inside section of my lock showing the bolts in an inoperative position. Fig. 3 is a similar view showing the bolts in an operative position; Fig. 4 is a vertical detail of the face plate. c i

In the drawings, A is the lock casing as a whole of any suitable size, material or form.

13 is the latch-bolt mounted on suitable bearings b, and provided with guides b and having therein at the inner end a suitable aperture ?2 adapted to receive the C is the lock-bolt formed with a pivoted joint at (l and provided with suitable guides d, the said joint (Z allowing movement of the rear portion of lock-boltC in a'vertical plane when engaged by the key to disengage Application filed April 4, 1912. Serial No. 688,518. I

I G-G are suitable We set forth.

is anotch 1n the lowerside of C adapted to. engage with the; perpendicular stud e, ol and f are further notches in the lockbolt G adapted'to engage with the stud .e"respectively. 1

ights pivot-ally secured on the inside of the casing A at.--h,

ends of lthelock-boltsB and C respectively. The. weight Gr being adapted to press against the semi-circular end ofthe latch-boltB to A force said-bolt outwardly, and the weight G adapted to'press upon the lock-bolt C, to keep same infposition.

The operator. for the j, cons ists,of a spindle fitting'in the aperture 6 of the bolt; Band adapted to project on each side ofthe doorbeneath the stationary knob or handle providedwith suitable head-pieces or tops, for the thumb. From the foregoing it will be apparent that when the key I is inserted and turned Pat nted e... 17, 1912.

the notches studs o l fand e and fand e respectively, for" the purpose hereinafter.

the keyI and I adapted to bear against the semi-circular latch-bolt shown as I A it will engage with the notch d raising the bolt'C outof the notch f and in combination with the weight G,'force said lock-bolt C outwardly, until it engages the stud eby means of the notch d thus securely locking the door. The latch-bolt B is forced continuously outward by the weight G. and

when'desired to be operated inwardly is so directed by means ofthe thumb-slide j'fitting in the aperture 5 It will thus be seen that while being thoroughly effective and practical the lock. is

simplicity itself, besides being most inexpensive to manufacture and having no parts liable to get out of order.

While the foregoing is but a preferred form of my device-I desire it understood that changes might be resorted to in the form and arrangement of the several parts and scope of my claim; hence I do not wish to limit myself strictly to the construction In looks, a casing, a lock-bolt slidably .100 I I described without departing from the spirit" mounted in said casing and having'a joint near its front end allowing its rear portion to move in a vertical plane, and guides for its forwardpart, the rear portionl'of said bolt being provided with two notches its lower edge and having tllQliPPBI' part of its rear end rounded, in combination with two lugs secured in said casing to engage said notches respectively, one engaging one notch in one extreme position of the bolt and the other the other notch in the other extreme position of the bolt, means for disengaging said notches and lugs and reciprocating said bolt and a pivoted Weight having a rounded face bearing on the rounded" part of the rear end of said bolt to force the said notches and lugsinto tight engagement Canada, this 21st day of March 1912.

ALBERT E. SPOONER.

Witnesses W. T. CUrrE-QUIN,

THOMAS GREEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

7 Washington, D. G. 

